Learn More
Current techniques used for total knee arthroplasty rely on conventional instrumentation that violates the intramedullary canals. Accuracy of the instrumentation is questionable, and assembly and disposal of the numerous pieces is time consuming. Navigation techniques are more accurate, but their broad application is limited by cost and complexity. We aimed(More)
We prospectively obtained preoperative and 3-month postoperative lateral pelvic radiographs in the standing and sitting positions from 84 patients who underwent total hip arthroplasty. We measured pelvic orientation (flexion extension) using the anterior pelvic plane as defined by the anterior superior iliac spines and pubic tubercles as references. There(More)
BACKGROUND Restoring function and alignment when treating knee arthritis with a total knee arthroplasty (TKA) in patients who have an extra-articular deformity (EAD) from a malunion or with retained femoral hardware is a challenge. The normal anatomical landmarks are hard to find and difficult to use to obtain correct alignment. The procedure will be(More)
Instability is one of the most challenging complications of total hip arthroplasty. The cause of instability is not always clear and treatment outcome is not always satisfactory. Treatment can be optimized by accurate identification of the cause of instability and precise surgical technique. In this case report, we illustrate the use of a three-dimensional(More)
Variations in pelvic orientation affect preoperative planning decisions, intraoperative navigation, and postoperative measurements. By providing the means to measure pelvic flexion at low cost and reporting pelvic flexion using the standard reference system, a lateral radiograph technique based on the pubic tubercles and anterior superior iliac spines may(More)
Assessment of effect of braces on knee joint of OA patients with 3D CT and bi-plane dynamic fluoroscopy images T. Ohnishi, M. Suzuki, T. Kobayashi, S. Naomoto, A. Nawata, H. Haneishi Chiba University, Graduate School of Engineering, Chiba, Japan JSPS Research Fellow, Tokyo, Japan Chiba University, Graduate School of Medicine, Chiba, Japan Chiba University,(More)
Unstable intertrochanteric fracture in elderly is a challenging surgical condition with a high risk of morbidity and mortality. The aim of this study is to evaluate the results of bipolar arthroplasty as an alternative to the standard treatment of internal fixation. Materials and Methods: 41 patients (22 females and 19 males—all were 65 years old or above)(More)
The technology of computer-assisted orthopaedic surgery (CAOS) has been used in many developed countries for the last two decades. Initially, it was thought that CAOS would be the standard in surgical practice, but so far its clinical application has been limited due to the involved cost and complexity. The cost-effectiveness of CAOS techniques has also(More)